sixty-thirty
Super Veteran
Im currently using faito 60mm bore and its true about the 6 seconds. its very fast and it seems to get hot alot easy then the stock bore and i notice i need 2 oil changers a month now before it was 1 oil change (estimation about 1000km) to keep the engine in a nice temperature and to get a smooth feel.I guess it all matters on the break in style and the mechanic . and im using stock head with turbo cam .. electric start works (Y)